While over time theories of change have become synonymous with simple if/then statements, a strong theory of change should actually be a much more detailed, context-specific articulation of how we *theorize* change will happen under a program. This a Workbook of Step-by-Step Process for Developing or Strengthening Theories of Change which can help stakeholders work through the process of developing strong theories of change that answers the questions about the outcomes, entry points, interventions and assumptions.